石墨烯包覆碳纳米管-硫(CNT-S)复合材料及锂硫电池性能  

Preparation of Graphene Coated Carbon Nanotube-Sulfur Composite and Its Performance for Lithium-Sulfur Battery

作　　者：郑加飞[1] 郑明波[2] 李念武[1] 吕洪岭[1] 邱兰[1] 曹洁明[1] 姬广斌[1] 

机构地区：[1]南京航空航天大学,材料科学与技术学院,纳米材料研究所,南京210016 [2]南京大学,微结构国家实验室,电子科学与工程学院,南京210093

出　　处：《无机化学学报》2013年第7期1355-1360,共6页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.51202106;No.51172109);江苏省自然科学基金(No.BK2010497)资助项目

摘　　要：针对锂硫电池研究与实际应用中遇到的主要问题,本文通过一种简单有效的水热法还原氧化石墨烯对商用碳纳米管-硫(CNT-S)纳米复合材料进行包覆,形成一种可有效抑制多硫聚合物扩散的石墨烯包覆结构。X射线衍射(XRD),扫描电子显微镜(SEM)表征结果表明硫均匀地负载在碳纳米管上,并且在CNT-S复合材料外表面包覆有一层石墨烯。电化学测试结果表明,这种包覆结构能显著提高CNT-S复合材料的锂硫电池性能。To solve the main problems encountered in the lithium-sulfur battery research and practical application, a simple and effective hydrothermal reduction of graphene oxide was employed to encapsulate commercial carbon nanotube-sulfur （CNT-S） nanocomposite in this study, then an effective type of graphene coated CNT-S nanostructure was formed. The polysulphide anions diffusion phenomenon was effectively restrained by the graphene coating structure. The nanocomposites were characterized by X-ray diffraction and scanning electron microscope. The results indicated that elemental sulfur was uniformly distributed across the CNT, and a layer of graphene coated on the surface of CNT-S nanocomposite. The electrochemical test results showed that the graphene coating nanostructure obviously improved the lithium-sulfur battery performance of the CNT-S nanocomposite.

关 键 词：石墨烯 锂硫电池 碳纳米管 硫 

分 类 号：TM912.9[电气工程—电力电子与电力传动] TQ152[化学工程—电化学工业]